Eavesdropping of two-way coherent-state quantum cryptography via Gaussian quantum cloning machines

Details Eavesdropping of two-way coherent-state quantum cryptography via Gaussian quantum cloning machines Eavesdropping of two-way coherent-state quantum cryptography via Gaussian quantum cloning machines

2009-01-22

arxiv.org/abs/0901.3568v1

Proc. of ICQNM 2009 (IEEE, Los Alamitos, California, 2009), pp. 38-41

Physics

Quantum Physics

Proceeding of ICQNM 2009, The Third International Conference on Quantum, Nano and Micro Technologies, Cancun, Mexico, 1-7 Febr

Scientific paper

10.1109/ICQNM.2009.8

We consider one of the quantum key distribution protocols recently introduced in Ref. [Pirandola et al., Nature Physics 4, 726 (2008)]. This protocol consists in a two-way quantum communication between Alice and Bob, where Alice encodes secret information via a random phase-space displacement of a coherent state. In particular, we study its security against a specific class of individual attacks which are based on combinations of Gaussian quantum cloning machines.

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